Add a variable to customize the Redis DNS name

Author: MSR-RyanFisher

main.tf

@@ -143,7 +143,7 @@ resource "aws_cloudwatch_metric_alarm" "cache_memory" {
 module "dns" {
   source  = "git::https://github.com/cloudposse/terraform-aws-route53-cluster-hostname.git?ref=tags/0.3.0"
   enabled = var.enabled && var.zone_id != "" ? true : false
-  name    = var.name
+  name    = length(var.host_name) > 0 ? var.host_name : module.label.id
   ttl     = 60
   zone_id = var.zone_id
   records = [join("", aws_elasticache_replication_group.default.*.primary_endpoint_address)]

variables.tf

@@ -180,6 +180,12 @@ variable "auth_token" {
   default     = ""
 }
 
+variable "host_name" {
+  type        = string
+  description = "The DNS subdomain to add to Route53 for the cluster."
+  default     = ""
+}
+
 variable "replication_group_id" {
   type        = string
   description = "Replication group ID with the following constraints: \nA name must contain from 1 to 20 alphanumeric characters or hyphens. \n The first character must be a letter. \n A name cannot end with a hyphen or contain two consecutive hyphens."